Medial collateral ligament-ganglion cyst: A rare case report and review of its literature

Ganglion cysts are found in locations which are under constant stress. Although somewhat controversial, one common explanation for the formation of ganglion cysts is that they are the result of mucoid cystic degeneration in collagenous structures. Most commonly, they are found along the tendons or joints of wrist or hand. The common locations of ganglion cysts are the wrist, knee, and anterolateral aspect of the ankle. Intra-articular ganglion cysts of the knee are rare, and most originate from the cruciate ligaments. The symptoms and signs of intra-articular ganglion cysts of the knee are pain, effusion, limitation of motion, and a clicking sensation. Increased size may lead to increased symptoms. Their location can sometimes interfere with joint movement. We present a case of ganglion cyst arising over medial collateral ligament which was presented as a swelling and investigated using sonography, magnetic resonance imaging and arthroscopy, surgically resected and confirmed on histopathology. Thus awareness of the symptoms and locations is necessary.